Antenna device

ABSTRACT

An antenna device is provided, which includes a first antenna unit and a second antenna unit. The first antenna unit includes a first radiation module, a power divider/combiner network connected to the first radiation module, and a feeder interface connected to the power divider/combiner network. The feeder interface is connected to a radio remote unit (RRU) or a macro base station through a feeder. The second antenna unit includes a second radiation module, a transceiver array connected to the second radiation module, a baseband processing unit (BPU) connected to the transceiver array, and an optical fiber interface connected to the BPU. The optical fiber interface is connected to a baseband unit (BBU) through an optical fiber. Therefore, after the existing passive antenna is replaced by the provided antenna device, the RRU or macro base station in the original network can still be used, which reduces waste of resources.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2009/071973, filed on May 26, 2009, which is hereby incorporatedby reference in its entirety.

FIELD OF THE TECHNOLOGY

The present invention relates to the field of communications technology,and more particularly to an antenna device.

BACKGROUND OF THE INVENTION

In a mobile communication system, a macro base station is usuallyinstalled in an equipment room under a tower, or outdoors under a tower(with no equipment room). In this case, the macro base station under thetower and an antenna on the tower need to be connected through a longhigh-power radio-frequency (RF) cable (feeder). However, the loss riseswith the increase of the length of a feeder, and is generally around 3dB.

In order to reduce the feeder loss to the minimum, the base stationtends to be moved onto the tower. An existing radio remote unit (RRU)and an integrated antenna (RRU+ Antenna) to be proposed are suchproducts. More advanced products include an active antenna and anintelligent antenna.

As shown in FIG. 1, the RRU is located at a link between a passiveantenna and an indoor baseband unit (BBU). Interface signals between theRRU and the passive antenna are RF signals, and the RRU is connected tothe passive antenna through a feeder. Interface signals between the RRUand the BBU are common public radio interfaces (CPRIs) or other digitalsignals, and the RRU is connected to the BBU through an optical fiber(definitely, the RRU and the BBU may also communicate through anelectrical interface or other digital signals). As shown in FIG. 2,external interfaces of the integrated antenna, the active antenna, orthe intelligent antenna are CPRIs or other digital signals, and can beconnected to the BBU through optical fibers.

Macro base stations invested and constructed by operators in the earlystage and the currently popular RRU products may not be abandoned due tothe emergence of the integrated antenna (or the active antenna), as theearly investment of the operators is huge, and the maximization ofinvestment returns has to be considered. Because the macro base stationsand RRU products are still used in the network, the commercialization ofthe integrated antenna, or the active antenna and intelligent antennahaving more powerful functions is affected.

The functions of the macro base station and RRU are integrated in theintegrated antenna, active antenna, or intelligent antenna, so that thefunctions of these antennas are more powerful. In the process of newlyestablishing a communication network, if the integrated antenna, activeantenna, or intelligent antenna is adapted to replace the passiveantenna connected to the macro base station or RRU in the existingnetwork, because the interface signals of the communication between themacro base station or RRU and the passive antenna are RF signals, afterthe replacement, the integrated antenna, active antenna, or intelligentantenna is not compatible with the existing macro base station or RRU.As a result, the macro base station or RRU becomes unnecessary, whichcauses waste of resources.

SUMMARY OF THE INVENTION

The present disclosure is directed to an antenna device. According tosome embodiments of the present disclosure, the RRU or macro basestation in the existing network can still be used after an existingpassive antenna is replaced by an antenna device, which reduces waste ofresources.

In an embodiment, the present invention provides an antenna device,which includes a first antenna unit and a second antenna unit. The firstantenna unit includes a first radiation module, a power divider/combinernetwork connected to the first radiation module, and a feeder interfaceconnected to the power divider/combiner network. The feeder interface isconnected to an RRU or a macro base station through a feeder. The secondantenna unit includes a second radiation module, a transceiver arrayconnected to the second radiation module, a baseband processing unit(BPU) connected to the transceiver array, and an optical fiber interfaceconnected to the BPU. The optical fiber interface is connected to a BBUthrough an optical fiber.

In an embodiment, the present invention provides another antenna device,which includes a first antenna unit and a second antenna unit. The firstantenna unit includes a first radiation module, a first powerdivider/combiner network connected to the first radiation module, and afeeder interface connected to the first power divider/combiner network.The feeder interface is connected to an RRU or a macro base stationthrough a feeder. The second antenna unit includes a second radiationunit, a second power divider/combiner network connected to the secondradiation unit, a transceiver unit connected to the second powerdivider/combiner network, a BPU connected to the transceiver unit, andan optical fiber interface. The optical fiber interface is connected toa BBU through an optical fiber.

As described above, in the antenna device of the present invention, thefirst antenna unit is connected to the RRU or macro base station throughthe feeder interface and the second antenna unit is connected to the BBUthrough the optical fiber interface, so that the two antenna units areintegrated in one device. When the antenna device according to theembodiment of the present invention is adapted to replace the passiveantenna in the prior art, the RRU or macro base station in the existingnetwork is connected to the first antenna unit, and thus the firstantenna unit may use existing frequency bands to work. Besides, thesecond antenna unit is connected to the BBU through the optical fiberinterface.

Therefore, after the original passive antenna is replaced by the antennadevice of the present invention, the RRU or macro base station in theoriginal network can still be used, which reduces waste of resources.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the technical solution under the present inventionclearer, the accompanying drawings for illustrating the embodiments ofthe present invention or the prior art are outlined below. Evidently,the accompanying drawings are for the exemplary purpose only, and thoseskilled in the art can derive other drawings from such accompanyingdrawings without any creative effort.

FIG. 1 is a schematic view of installation of an RRU and a BBU of apassive antenna in the prior art;

FIG. 2 is a schematic view of installation of an integrated antenna, anactive antenna, an intelligent antenna, and a BBU in the prior art;

FIG. 3 is a schematic structural view of an antenna device according toa first embodiment of the present invention;

FIG. 4 is a schematic structural view of an antenna device according toa second embodiment of the present invention;

FIG. 5 is a side view of a coaxial antenna device according to anembodiment of the present invention;

FIG. 6 is a side view of a non-coaxial antenna device according to anembodiment of the present invention; and

FIG. 7 is a schematic view of installation of an antenna device and abase station according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

For better understanding of the objective, technical solution and meritsof the present invention, the following describes the present inventionin detail with reference to the accompanying drawings. It isunderstandable that the embodiments herein are for the exemplary purposeonly, and are not intended to limit the present invention.

FIG. 3 is a schematic structural view of an antenna device according toa first embodiment of the present invention. The antenna device includesa first antenna unit and a second antenna unit.

The first antenna unit includes a first radiation module 10, a powerdivider/combiner network 12 connected to the first radiation module 10,and a feeder interface 14 connected to the power divider/combinernetwork 12. The first radiation

The feeder interface 14 is connected to an RRU or a macro base stationthrough a feeder, and is adapted to receive an RF signal transferred bythe RRU or macro base station through the feeder. The powerdivider/combiner network 12 is adapted to divide the RF signal intomultiple RF signals and send the multiple RF signals to the plurality ofantenna dipoles of the first radiation module 10. The first radiationmodule 10 converts the RF signals sent by the power divider/combinernetwork 12 into electromagnetic wave signals, and sends theelectromagnetic wave signals.

After receiving the electromagnetic wave signals, the antenna dipoles ofthe first radiation module 10 convert the received electromagnetic wavesignals into multiple RF signals, and send the multiple RF signals tothe power divider/combiner network 12. The power divider/combinernetwork 12 combines the multiple RF signals into one RF signal, andsends the combined RF signal to the feeder through the feeder interface14.

The first antenna unit may be a passive antenna, which may be connectedto a feeder through the feeder interface 14. The feeder is connected tothe RRU or the macro base station. The RRU or the macro base station isconnected to a BBU through an optical fiber.

The second antenna unit includes a second radiation module 20, atransceiver array 22 connected to the second radiation module 20, a BPU24 connected to the transceiver array 22, and an optical fiber interface26 connected to the BPU 24. The second radiation modules 20 may be anantenna dipole array formed of a plurality of antenna dipoles. Thetransceiver array 22 includes a plurality of transceiver units. Theantenna dipoles of the second radiation module 20 are connected to thecorresponding transceiver units of the transceiver array 22, separately.That is, each antenna dipole of the second radiation module 20 isconnected to a corresponding transceiver unit of the transceiver array22.

The optical fiber interface 26 is connected to the BBU through anoptical fiber, and is adapted to receive a digital signal transferred bythe BBU through the optical fiber. The BPU 24 is adapted to process thereceived digital signal into an analog signal for transmission, and sendthe analog signal for transmission to the transceiver array 22. Each Thetransceiver unit of the transceiver array 22 modulates and up-convertsthe processed analog signal for transmission into an RF signal fortransmission, and sends the RF signal for transmission to thecorresponding antenna dipole of the second radiation module 20. Theantenna dipole converts the RF signal for transmission into anelectromagnetic wave signal and sends the electromagnetic wave signal.

The process for the BPU 24 to convert the received digital signal intothe analog signal for transmission includes the following steps: A crestfactor reduction (CFR) clipping process is performed on the digitalsignal output from the BBU to the optical fiber interface 26 (forexample, a CPRI). Multiple IQ signals are output to a digital beamforming (DBF) module through a bus driver to realize DBF. Digitalpre-distortion (DPD) is then performed on the IQ signals. The IQ signalsare finally converted into analog signals for transmission with a D/Aconverter. The analog signals are sent to the transceiver array 22.

After receiving the electromagnetic wave signals, the antenna dipoles ofthe second radiation module 20 convert the received electromagnetic wavesignals into RF signals for reception, and send the RF signals forreception to the transceiver units of the transceiver array 22. Thetransceiver unit down-converts and demodulates the RF signals forreception into analog signals for reception, and sends the analogsignals for reception to the BPU 24. The BPU 24 processes the analogsignals for reception into digital signals for reception, and sends theprocessed digital signals for reception to the BBU through the opticalfiber interface 26.

The process for the BPU 24 to convert the analog signals for receptioninto the digital signals for reception includes the following steps: theanalog signals for reception output by the transceiver array 22 areconverted into digital signals for reception with an A/D converter.Digital filtering (by using a finite impulse response (FIR) filter, acascade integrator comb (CIC) filter, and a half-band filter (HBF)) andDBF are then performed on the digital signals for reception. Aftercorrelative accumulation of each digital signal for reception in acorrelative accumulator, the digital signals after correlativeaccumulation are transferred to the BBU through the optical fiberinterface 26 (for example, the CPRI).

It is understandable that, the second antenna unit may further include apower supply interface 28, connected to the transceiver array 22 and theBPU 24, and adapted to supply power to the transceiver array 22 and theBPU 24.

It is understandable that, in the embodiment of the present invention,the first antenna unit may further include a phase shift network whichis adapted to realize analog beam forming (ABF). The phase shift networkmay be integrated with the power divider/combiner network 12.

According to the embodiment of the present invention, the antennadipoles of the first radiation module 10 and the second radiation module20 are coaxially disposed (a working frequency band of the secondantenna unit (a typical value is between 1710 MHz and 2170 MHz) is abouttwice as much as a working frequency band of the first antenna unit (atypical value is between 824 MHz and 960 MHz)). In another embodiment,the antenna dipoles of the first radiation module 10 and the secondradiation module 20 may also be non-coaxial.

The transceiver array 22 and the BPU 24 in the second antenna unit forman RRU. The second antenna unit may be made into an integrated antenna,an active antenna, or an intelligent antenna. The active antenna is usedas an example in the embodiment of the present invention. The secondantenna unit is connected to an optical fiber through the optical fiberinterface 26, and the optical fiber is connected to the BBU.

In the embodiment of the present invention, the first antenna unit ofthe antenna device is connected to the RRU or macro base station throughthe feeder interface and the second antenna unit is connected to the BBUthrough the optical fiber interface, so that the two antenna units areintegrated in one device. When the antenna device according to theembodiment of the present invention is adapted to replace the passiveantenna in the prior art, the RRU or macro base station in the existingnetwork is connected to the first antenna unit, and thus the firstantenna unit may use existing frequency bands to work. During theestablishment of a new network, the second antenna unit is connected toa BBU in another frequency band through the optical fiber interface, sothat the two networks may share one antenna unit. After the same networkand/or the same frequency band are expanded, the second antenna unit isconnected to the BBU in the original network through the optical fiberinterface. That is, the RRU in the existing network and the antennadevice in the embodiment of the present invention share one BBU.Therefore, after the existing passive antenna is replaced by the antennadevice in the embodiment of the present invention, the RRU or macro basestation in the existing network can still be used, which reduces wasteof resources.

Additionally, as the same antenna device is shared, the existing towerand station may also be used, and the operator does not need toestablish a new tower or station, nor pay extra rent, therebyeffectively reducing the costs of establishing a new network.

FIG. 4 is a schematic structural view of an antenna device according toa second embodiment of the present invention. The antenna deviceincludes a first antenna unit and a second antenna unit.

The first antenna unit is the same as the first antenna unit in theantenna device according to the first embodiment of the presentinvention, which includes a first radiation module 50, a first powerdivider/combiner network 52 connected to the first radiation module 50,and a feeder interface 54 connected to the first power divider/combinernetwork 52. The first radiation module 50 may be an antenna dipole arrayformed of a plurality of antenna dipoles. A working mode of the firstantenna unit is also the same as the first antenna unit in the antennadevice according to the first embodiment of the present invention, andthe details will not be described herein again.

The second antenna unit includes a second radiation module 60, a secondpower divider/combiner network 62 connected to the second radiationmodule 60, a transceiver unit 64 connected to the second powerdivider/combiner network 62, a BPU 66 connected to the transceiver unit64, and an optical fiber interface 68. The second radiation module 60may be an antenna dipole array formed of a plurality of antenna dipoles.

The optical fiber interface 68 is connected to a BBU through an opticalfiber, and is adapted to receive a digital signal transferred by the BBUthrough the optical fiber. The BPU 66 is adapted to process the digitalsignal into an analog signal for transmission, and send the analogsignal for transmission to the transceiver unit 64. The transceiver unit64 modulates and up-converts the processed analog signal fortransmission into an RF signal for transmission, and sends the RF signalfor transmission to the second power divider/combiner network 62 throughan internal feeder of the second antenna unit. The second powerdivider/combiner network 62 divides the RF signal for transmission intomultiple signals and sends the multiple signals to the antenna dipolesof the second radiation unit 60. The antenna dipoles convert the dividedRF signals into electromagnetic wave signals and send theelectromagnetic wave signals.

The process for the BPU 66 to convert the digital signal into the analogsignal for transmission includes the following steps: A CFR clippingprocess is performed on the digital signal output from the BBU to theoptical fiber interface 68 (for example, a CPRI). DPD is then performedon the processed signal. The signal is finally converted into an analogsignal for transmission in a D/A converter and sent to the transceiverunit 64.

After receiving the electromagnetic wave signals, the antenna dipoles ofthe second radiation unit 60 convert the received electromagnetic wavesignals into multiple RF signals for reception, and send the multiple RFsignals to the second power divider/combiner network 62. The secondpower divider/combiner network 62 combines the multiple RF signals forreception into one RF signal for reception, and sends the combined RFsignal to the transceiver unit 64. The transceiver unit 64 demodulatesand down-converts the RF signal for reception into an analog signal forreception, and sends the analog signal for reception to the BPU 66. TheBPU 66 processes the analog signal for reception into a digital signal,and sends the digital signal to the BBU through the optical fiberinterface 68.

The process for the BPU 66 to convert the analog signal for receptioninto the digital signal includes the following steps: A/D conversion andfiltering (by using an FIR filter, a CIC filter, or an HBF) areperformed on the analog signal for reception output by the transceiverunit 64, and the processed signal is then transferred to the BBU throughthe optical fiber interface 68 (for example, a CPRI).

It is understandable that, the second antenna unit may further include apower supply interface 69, connected to the transceiver unit 64 and theBPU 66, and adapted to supply power to the transceiver unit 64 and theBPU 66.

It is understandable that, in the embodiment of the present invention,the first antenna unit may further include a first phase shift network,adapted to realize ABF. The first phase shift network may be integratedwith the first power divider/combiner network 52.

It is understandable that, in the embodiment of the present invention,the second antenna unit may further include a second phase shiftnetwork, adapted to realize ABF. The second phase shift network may beintegrated with the second power divider/combiner network 62.

In the embodiment of the present invention, the antenna dipoles of thefirst radiation module 50 and the second radiation module 60 arenon-coaxially disposed. In another embodiment, the antenna dipoles ofthe first radiation module 50 and the second radiation module 60 mayalso be coaxial.

The transceiver unit 64 and the BPU 66 in the second antenna unit forman RRU. The second antenna unit may be made into an integrated antenna,an active antenna, or an intelligent antenna. The integrated antenna isused as an example in the embodiment of the present invention. Thesecond antenna unit is connected to an optical fiber through the opticalfiber interface 68, and the optical fiber is connected to the BBU.

In the embodiment of the present invention, the first antenna unit ofthe antenna device is connected to the RRU or macro base station throughthe feeder interface and the second antenna unit is connected to the BBUthrough the optical fiber interface, so that the two antenna units areintegrated in one device. When the antenna device according to theembodiment of the present invention is adapted to replace the passiveantenna in the prior art, the RRU or macro base station in the existingnetwork is connected to the first antenna unit, and thus the firstantenna unit may use existing frequency bands to work. During theestablishment of a new network, the second antenna unit is connected toa BBU in another frequency band through the optical fiber interface, sothat the two networks may share one antenna unit. After the same networkand/or the same frequency band are expanded, the second antenna unit isconnected to the BBU in the existing network through the optical fiberinterface. That is, the RRU in the existing network and the antennadevice in the embodiment of the present invention share one BBU.Therefore, after the existing passive antenna is replaced by the antennadevice in the embodiment of the present invention, the RRU or macro basestation in the existing network can still be used, which reduces wasteof resources.

Additionally, as the same antenna device is shared, the existing towerand station may also be used, and the operator does not need toestablish a new tower or station, nor pay extra rent, therebyeffectively reducing the costs of establishing a new network.

FIG. 5 is a side view of a coaxial antenna device according to anembodiment of the present invention. The radiation units of the firstantenna unit and the second antenna unit are antenna dipole arrays, andthe antenna dipoles are coaxially disposed.

As shown in FIG. 5, the coaxial dipoles are installed on a reflectingplate and located in a space formed by an antenna cover (not shown inthe figure) and the reflecting plate.

An I-shaped framework and the reflecting plate form a first antenna unit(passive antenna) shielding cavity. The power divider/combiner networkand the phase shifter are located in the shielding cavity. A powerdivider/combiner and phase shifter board clings to a backside of thereflecting plate.

The I-shaped framework and a radiator form a second antenna unit (activecircuit) shielding cavity. A transceiver (array) board is located insidethe shielding cavity. In the case of an integrated antenna, only thetransceiver unit and the BPU exist. In the case of an active antenna, atransceiver array formed of N transceiver units and the BPU exist, and atransceiver unit (or transceiver array) board clings to the radiator.

Pins of the coaxial dipoles are welded on the power divider/combiner andphase shifter board. The transceiver (array) board is connected to thepower divider/combiner and phase shifter board through cables orconnectors. Thereby, the transceiver (array) board and the coaxialdipoles are connected through the power divider/combiner and phaseshifter board.

It is understandable that, cables can be directly guided from thecoaxial dipoles, and connected to the transceiver (array) board and thepower divider/combiner and phase shifter board.

FIG. 6 is a side view of a non-coaxial antenna device according to anembodiment of the present invention. A difference between the antennadevice in FIG. 6 and the antenna device in FIG. 5 is that, the frameworkis omitted, and the reflecting plate and the radiator form asingle-layer shielding cavity. Moreover, a separating rib is disposed ata bottom of the reflecting plate to further divide the single-layershielding cavity into two large shielding cavities. One is the firstantenna unit (passive antenna) shielding cavity, and the other one isthe second antenna unit (active circuit) shielding cavity. Certainly, aslong as more separating ribs are disposed at the bottom of thereflecting plate, the shielding cavity can be further divided.

The power divider/combiner and phase shifter board and the transceiver(array) board are all installed on the radiator. If the boards arecoplanar, the boards may be integrated into one board, as shown in FIG.6; if the boards are not coplanar, the boards are separated. The boardsare connected to the antenna dipoles through cables and connectors.

FIG. 7 is a schematic view of installation of an antenna device 100 anda base station according to an embodiment of the present invention. Asthe antenna device 100 according to the embodiment of the presentinvention includes a first antenna unit and a second antenna unit, afterthe passive antenna in the prior art is replaced by the antenna device100, the first antenna is connected to a feeder through a feederinterface, and the feeder is then connected to an RRU or a macro basestation in the existing network. The second antenna unit is connected toan optical fiber through an optical fiber interface. During theconstruction of a network with a new license, the optical fiber isconnected to a BBU in another frequency band, so as to realize theconstruction of the desired network. In this manner, the originallyestablished RRU or macro base station can still be used, whicheffectively reduces waste of resources. After the existing network isexpanded, the optical fiber is connected to the BBU in the existingnetwork, such that the RRU in the existing network and the antennadevice 100 in the embodiment of the present invention share one BBU.

Although the present invention is described above with some exemplaryembodiments, the scope thereof is not limited thereby. Variousmodifications and variations that can be easily thought of by personsskilled in the art without departing from the scope of the inventionshall be considered falling within the scope of the invention.Therefore, the protection scope of the invention falls in the appendedclaims.

1. An antenna device, comprising a first antenna unit and a second antenna unit, wherein the first antenna unit comprises a first radiation module, a power divider/combiner network connected to the first radiation module, and a feeder interface connected to the power divider/combiner network, wherein the feeder interface is connected to a radio remote unit, RRU, or a macro base station through a feeder, the second antenna unit comprises a second radiation module, a transceiver array connected to the second radiation module, a baseband processing unit, BPU, connected to the transceiver array, and an optical fiber interface connected to the BPU, wherein the optical fiber interface is adapted to connect to a baseband unit, BBU, through an optical fiber.
 2. The antenna device according to claim 1, wherein the first radiation module is an antenna dipole array, comprising at least two antenna dipoles.
 3. The antenna device according to claim 1, wherein the feeder interface is adapted to receive a radio frequency, RF, signal transferred by the RRU or macro base station through the feeder, the power divider/combiner network is adapted to divide the RF signal into multiple RF signals and send the multiple RF signals to the first radiation module, and the first radiation module is adapted to convert the RF signals sent by the power divider/combiner network into electromagnetic wave signals and send the electromagnetic wave signals.
 4. The antenna device according to claim 1, wherein the optical fiber interface is adapted to receive a digital signal transferred by the BBU through the optical fiber, and the BPU is adapted to process the received digital signal into an analog signal for transmission and send the analog signal for transmission to the transceiver array.
 5. The antenna device according to claim 4, wherein the transceiver array comprises at least two transceiver units, the second radiation module comprises an antenna dipole array comprising at least two antenna dipoles corresponding to the at least two transceiver units, the transceiver unit is adapted to modulate and up-convert the processed analog signal for transmission into an RF signal for transmission and send the RF signal for transmission to the corresponding antenna dipole of the second radiation module, and the antenna dipole is adapted to convert the RF signal for transmission into an electromagnetic wave signal and send the electromagnetic wave signal.
 6. The antenna device according to claim 1, wherein the second antenna unit further comprises a power supply interface, which is connected to the transceiver array and the BPU and adapted to supply power to the transceiver array and the BPU.
 7. An antenna device, comprising a first antenna unit and a second antenna unit, wherein the first antenna unit comprises a first radiation module, a first power divider/combiner network connected to the first radiation module, and a feeder interface connected to the first power divider/combiner network, wherein the feeder interface is connected to a radio remote unit, RRU, or a macro base station through a feeder, the second antenna unit comprises a second radiation unit, a second power divider/combiner network connected to the second radiation unit, a transceiver unit connected to the second power divider/combiner network, a baseband processing unit, BPU, connected to the transceiver unit, and an optical fiber interface, wherein the optical fiber interface is adapted to connect to a baseband unit, BBU, through an optical fiber.
 8. The antenna device according to claim 7, wherein the first radiation module is an antenna dipole array, comprising at least two antenna dipoles.
 9. The antenna device according to claim 7, wherein the second radiation module is an antenna dipole array, comprising at least two antenna dipoles.
 10. The antenna device according to claim 9, wherein the optical fiber interface is adapted to receive a digital signal transferred by the BBU through the optical fiber, and the BPU is adapted to process the digital signal into an analog signal for transmission and send the analog signal for transmission to the transceiver unit.
 11. The antenna device according to claim 10, wherein the transceiver unit is adapted to modulate and up-convert the processed analog signal for transmission into a radio frequency, RF, signal for transmission and send the RF signal for transmission to the second power divider/combiner network through an internal feeder of the second antenna unit, the second power divider/combiner network is adapted to divide the RF signal for transmission into multiple signals and send the multiple signals to the antenna dipoles of the second radiation unit, and the antenna dipoles is adapted to convert the divided RF signals into electromagnetic wave signals and send the electromagnetic wave signals.
 12. The antenna device according to claim 7, wherein the second antenna unit further comprises a power supply interface, connected to the transceiver unit and the BPU, adapted to supply power to the transceiver unit and the BPU. 